I must admit I had some preconceptions when I picked up this book. I thought it might be a little weak on substance. I also thought it was trying to do too much, with such a broad topic. It turns out I was pleasantly surprised.
For starters I read the preface. The authors work in technical sales, and the target audience is pretty broad, from DBAs & Developers to Systems Administrators and also IT managers and business users. I emphasize this because it is well written to be a good introductory Oracle book for DBAs and Developers, and not too technical that these other audiences can't digest the material. More importantly it is very well written. The style is quite good. I guess that's no surprise, being that the book is in it's fourth printing.
I like the first chapter, Introducing Oracle, as it takes a stab at not only some of the history of the company, but the technology as well. I learned a few things along the way. It includes a "Summary of Oracle Database Features" which is broad and all encompassing. Sure you could probably find all of this in the documentation... somewhere! However, having it all summarized is very nice. Development Features, Connection Features, App Server, Distributed Features, Data Movement Features, Performance Features, Management Features, Backup Features, Availability Features, Security Features, and so on.
Chapter two covers the Oracle Architecture, nuts & bolts, chapter three installation, Chapter four data structures, chapter five management, chapter six security, seven performance, eight concurrency, nine transactions, ten warehousing, eleven high availability, twelve various hardware architectures, thirteen distributed db, fourteen extended datatypes, and fifteen beyond the database.
As I was flipping through the chapters, I was also looking for an easy way to find the 11g features. I guess I was thinking more along the lines of a New Features book, which this is not. However the book does include Appendix A, which clearly lists all the new stuff in Oracle 11g, so that fit the bill.
Overall it was a very comfortable read and enjoyable. Even if you are quite technical, you will surely learn something new as the broad spectrum of Oracle is so wide, that there are surely things you're not well familiar with. However it is primarily targeted to folks new to the Oracle world, who want to dip their toes in, and learn about the family of products. And for that I would really recommend it.